1911] Beutenmuller — New Holcas pis from Mexico 87 



fibers which are covered with a moss-Uke substance. The inner side of the shell 

 is densely covered with a rusty brown moss-like substance. Diameter 20-40 mm. 

 Habitat: Mexico. 



The galls were purchased by Mr. Lewis H. Weld from a woman 

 at a fruit stand on the street in the Mexico City and the specimens 

 evidently came from the nearby mountains. The galls were 

 bought September 12th, 1910 and the adults emerged between 

 October 2nd and 9th. The oak was kindly identified for me 

 by Dr. N. L. Britton. 



Holcaspis mexicana, sp. nov. (Plate 12, fig. 3.) 



Female. Head yellowish brown, rugoso-punctate and covered with pale haira. 

 Antennae slender, filiform, the terminal joints scarcely thicker than the basal joints, 

 14-jointed, first joint stout, second very short and sub-globular, third to sixth long 

 and slender, third the longest, seventh to thirteenth gradually becoming shorter, 

 terminal joint longer than the preceding, all yellowish-brown. Thorax finely and, 

 densely punctate, and covered with short decumbent dull yellowish hairs; 

 anterior parallel lines and space between black, as are also the lateral grooves. 

 Parapsidal grooves extending forward to the middle of the thorax. Anterior 

 parallel lines, sharply defined, smooth and almost reaching the middle of the thorax. 

 Lateral grooves long, smooth and sharply defined. Scutellum rugose, no foveae. 

 Pleurae punctate, hairy. Abdomen smooth, shining with short hairs at the base. 

 Reddish-brown, posterior end of second and third segment blackish brown dorsally. 

 Legs dark yellowish-brown and hairy. Wings yellowish hyaline, veins dark brown 

 and stout. Radial veins almost touching the costal marging. Areolet distinct. 

 Cubitus terminating some distance from the first cross-vein. Length, 4 mm. 



Gall. In a compact mass around the terminal twig of a species of oak. More 

 or less rounded with the sides usually flattened and pressed out of shape. Smooth, 

 somewhat shining, clay brown more or less tinged with red. Hard and woody with a 

 single rounded larval chamber near the base of the gall and firmly imbedded in the 

 hard inner substance. The individual galls measure from 8-18 mm. in diameter 

 and the entire mass 30 mm. in length and 25 mm., in width. 



Habitat: Guadalajara, Mexico. (D. L. Crawford.) 

 The specimen I received from Prof. C. F. Baker. 



Explanation of Plate 12. 



Fig. 1. Holcaspis mexicana sp. nov. 



2. Holcaspis mexicana sp. nov. Inside view. 



3. Holcaspis weldi sp. nov. 



